Change-speed gear



. P. WOOD.

CHANGE SPEEIJ GEAR. APPLICATION HLEQ MAR. 2, 19!?- Patented Mar. 28; 1922.

2 sums-sun 1L I 222mm E. P. WOOD CHANGE SPEED GEAR.

APPLICATION FiLED MAR. 2, 1917.

1311232. Patented Mar. 28, 1922..

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

P. WOOD, OF SANDERSVILLE, GEORGIA.

CHANGE-SPEED GEAR.

Specification of Letters Patent.

Patented Mar. 28, 1922.

lpplloation filed March 2, 1917. Serial No. 151,992.

To all whom it, may concern Be it known that I, Enwm P. \Vooo, a

.citizen of the United States, residing at sandersville, in the county of \Vashington and State of Georgia, have invented certain new and useful Improvements in Change- Speed Gears; and I do hereby declare the following-to be a full, clear, and exact deseription of the invention, such aswill enable others skilled in the art to which it appertains to make and use the same.

. This invention has for its object to provide a simple and etlicient change speed gear "for attachment to the change speed gear case of motor vehicles having the ordinary plan etal'y gear in order to provide second or in termediate forward speed.

With this and other objects in view, the

- invention consists in the novel construction,

combination and arrangement of parts will be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 represents a fragmentary side elevation of a motor vehicle chassis, illustrating theinvention applied to use,

- Figure 2 represents'a fragmentary plan [view of the invention applied to use,

Figure 3 represents a vertical sectional view through the change speed gear, and

Figure t represents a fragmentary longitudinal sectional view through the drive and driven shafts.

Referring to the drawings in detail, wherein similar reference numerals designate cor- I responding parts, throughout the several views, the numeral 5 indicates generally a well known type of explosive engine having the integral change speed gear case 6 in which is enclosed the ordinary type .of planetary transmission, which is controlled by the footpedals 7 projecting I wardly through the floor 8 of the motor v hicle, a fragment of which is illustrated in F igure 1.

In applying my change s eed gearing to use the gear-case 9 is atta'c ed to the rear flange 10 of the original gear case 6 of the motor vehicle and the propeller shaft 11 of the vehicle, which, for the-sake of convenlance, will be hereinafter referred to as'the drive shaft, isextended into thecasing 9 and 'is supported by hearing balls 12,to

reduoehictiohto the minimum. driven shite-1a s rotatably supported in. the rear gearwheel 17, which permanently meshes with sreiatively large gear whee 18 nonrotatably secured upon a counter shaft 15), which latter rotatably snpportedin the casing 5) on hearing balls. 20. The gear wheel 17 is formed with an integral flange 21. having external teeth 22, constituting partof a clutch men'iber. the othcrpart of which latter is carried by the slidable gear wheel 23, supported upon the adjacent terminal of the driven siaft 13, and secured against rotation thereon by the elongated keys 24. The gear wheel 23 is formed with an integral flai'ige 25, having internal teeth 26 adapted to interlock with the external teeth 22 of the flange 21 when the flanges are moved together, so as to lock the drive and driven shafts 11 and 1.3, IQSIMCtlV'BlY, for rotation together. The forward terminal of the driven shaft 13 is reduced, as indicated at 27, and is rotatably supported in an axial recess 28 formed in the gear wheel 1'7. When the gear Wheel 23 is moved rearwardly to its extreme rearward position, the

clutch members 21 and. 25 are disengaged and the gear wheel 23 is moved intomesh with a gear wheel 29 keyed upon the countershaft 19, thereby establishing a drive connection from the driven shaft 11 through the gear wheels 17, 18, 29 and 23.

The bottom of the casing 9 is preferably provided with a drain opening 31 in which -is removably fitted a plug 32.

A gear shifting rod 33 is slidably mounted in the upper portion of the gear casing 9,

and is attached to the, relatively adjustable arm 34. having a forked lower terminal 35 extending within the circumferential groove 36.01 a .lateral enlargement 37 of the gear wheel 23. The forward terminal of the shift rod 33 is offset, as indicated at 38, so

as to avoid the main gear case 6 and is pivotal]; connect-ed with the lower terminal of a. hand lever 3:39, which is supported at 4A) in the floor 8 ol the motor vehicle; 4

Under ordinary road conditiom; the lever 39 is adjusted so as to move the riuteh member .25 into engagement with the clutch nuanher 21, thus looking this driven shaft 13 for rotation with the drive shaftll. Then the clutch members are so adjimtod the variations in the speed o'f'thorear axio with relation to the engiiie shal't are eli'eried h the main planetary gear which is enrlosed by the casing 45. The gear wheel 22%;, may ho also moved to a neutral position. between the gear wheel 29 and the rlutrh n'ien'iber 2i, and in this position the drive and driven shafts i1 and 13 are disconnected. it is desirod to operate the vehiclo at a speed intermediate the two speeds" oi the ordinzn'y planetary transmission (5. the pedals T are adjusted so as to throw the transmission-into high gear, and the hand lever 39 is uulm quently adjusted so as to more tho {rear wheel 52 into mesh with the gear win-e1 525') on the counter shaft 19, and in this manner the power from the drive shaft 11 is tram mitted to the driven shaft 13 through the I Howevm' when several gear wheels 1?, l" :59 and 23 whit-h eli'ects a roduotion in the speedr-oiitlu-dri'i en' :ehaitt if with relatuizrto the. drive si'isi't't ll and mnuzequently inrr arses the power of the driven sh; i

What i a: turn is: in annihilation .w i tl vase. a" rear eid phi meam; tor ihe end phi vase. a diii'in'g ahalt exi'emling t n'ough the 1'92)! pull of the raise journalled in sfaid end plate. a wwypienwxital ease thin extendling outwardly from the suopimn oml trillion reducing devi -w; mounted hi iianggesi said iian g'w; also 'iiuQ um rid fastening means, 5- itl drim. mounted in one or said ohiees. h. mounted in the other oi paid rim I rhan 'e speed merhaniem within th Supple mental ease utilizing said Hha tls. i

in testimony whereof i ziliix in o in 'IHLVWLIHPUE' two withow iClIWlN l". liifif TV it new-arr:

l. IQ. (ll-nosey.

A. TINUYJSH.

x a -lmainge speed goal" to thereon, fastening to exteruhng' from the, 

